Table 4.

Distribution of the syntactic features in the complex and simple set of sentences for the three corpora.

Feature	Terence			Teacher			PaCCSS–IT
	Compl	Simp	Diff	Compl	Simp	Diff	Compl	Simp	Diff
Syntactic relations
Subjects	6.37	6.87	−0.50	5.25	6.71	−1.46	7.65	6.94	0.71
Objects	4.77	5.12	−0.34	4.93	4.92	0.01	1.82	1.90	−0.07
Subjects—passive	0.20	0.15	0.04	0.17	0.08	0.09	0.66	0.95	−0.29
Use of subordination
Subordinate clauses	51.86	51.41	0.45	53.08	47.35	5.73	50.083	50.078	0.005
Depth of “chains” of subord.	0.39	0.41	−0.03	0.39	0.27	0.12	0.05	0.06	−0.001
Post-main subordinates	40.54	43.42	−2.87	42.27	27.98	14.29	3.28	4.17	−0.89
Global and local parsed tree structure
Parse tree depth	5.80	5.56	0.24	5.10	4.46	0.64	2.85	2.70	0.15
Dependency links length	2.07	2.03	0.04	2.29	2.12	0.17	1.76	1.63	0.13
Length of the longest link	8.01	7.48	0.53	9.24	7.32	1.93	3.81	3.31	0.5
Verbal arity	1.93	1.95	−0.02	1.85	1.91	−0.05	2.09	2.08	0.01
Depth of prepositional “chains”	1.06	1	0.06	0.90	0.91	−0.01	0.44	0.41	0.02
Order of elements
Pre-verbal subjects	71.07	71.35	−0.28	51.16	61.71	−10.55	50.58	43.85	6.73
Post-verbal subjects	9.59	11.32	−1.73	16.62	15.51	1.11	15.36	14.37	0.99
Pre verbal objects	5.72	5.54	0.17	8.29	3.24	5.05	2.03	1.38	0.65

Statistically significant variations with respect to the Wilcoxon signed-rank test at p < 0.05 are bold.